<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>数字广角(number badge)</title>
  <style>
    .number-badge {
      display: inline-block;
      padding: 2px 5px;
      border-radius: 10px;
      font-size: 12px;
      color: white;
      background-color: red;
    }
  </style>
</head>
<body>

  <div class="number-badge">99+</div>
  
</body>
</html>